package com.lhkj.ct.framework.shiro.session;

import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.apache.shiro.web.util.WebUtils;
import org.springframework.util.StringUtils;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.Serializable;

/**
 * <p>
 *     自定义session管理器
 * </p>
 */
public class ShiroSessionManager extends DefaultWebSessionManager {

    /**
     * 这个是客户端请求给服务端带的header
     */
    public final static String HEADER_TOKEN_NAME = "auth-token";

    private static final String REFERENCED_SESSION_ID_SOURCE = "Stateless request";

    public ShiroSessionManager() {
        super();
        this.setDeleteInvalidSessions(true);
    }

    /**
     * 重写getSessionId,分析请求头中的指定参数，做用户凭证sessionId
     */
    @Override
    protected Serializable getSessionId(ServletRequest request, ServletResponse response){
        String id = WebUtils.toHttp(request).getHeader(HEADER_TOKEN_NAME);
        // 如果请求头有token，则从请求头中获取
        if (StringUtils.hasText(id)) {
            //如果请求头中有 authToken 则其值为sessionId
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, REFERENCED_SESSION_ID_SOURCE);
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID, id);
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID, Boolean.TRUE);
            request.setAttribute(HEADER_TOKEN_NAME, id);
            return id;
        }
        //如果没有携带id参数则按照父类的方式在cookie进行获取
        return super.getSessionId(request, response);
//        return null;
    }



}
